Which hash algorithms are supported?

The tool uses the Web Cryptography API to compute SHA-1, SHA-256, SHA-384, and SHA-512 digests. MD5 is not included because it is not exposed by Web Crypto in browsers.

How do I hash a binary file?

Click Hash file and select any file. The digest is computed from the raw bytes. Editing the text field switches back to hashing the text content instead.

How does hash comparison work?

Paste two hex strings into Hash A and Hash B. The tool normalizes whitespace and case, then shows whether they match — useful for verifying downloads against a published checksum.

Are my files uploaded anywhere?

No. File contents are read with FileReader and processed only inside your browser using crypto.subtle.digest.

ハッシュ生成

SHA 系ハッシュをテキスト・ファイルから計算

Text input

Hashes update automatically as you type. Uploading a file hashes raw bytes instead (shown below).

Loading editor...

Compare hashes

Paste two hex digests (spaces ignored, case-insensitive). Useful for verifying downloads.

Hash A

Hash B

Compute cryptographic hashes without uploading anything

SHA-256 is everywhere — verifying downloads, signing payloads, comparing files. Computing a hash in the browser keeps the input on your machine via the Web Crypto API, so you can hash sensitive text or large files locally without trusting a server. The tool also supports SHA-1, SHA-384, and SHA-512 for legacy and high-security needs.

Use the generator when you need to

Verify a download against a published checksum

Hash the file and compare against the project's listed SHA-256 to confirm integrity.

Generate a deterministic identifier

Hash a canonical payload to produce a stable ID for caching, deduplication, or content addressing.

Sanity-check a webhook signature

Compute the expected hash of a payload to validate against the signature header from the upstream service.

How to hash text or files quickly

1
Paste the text you want to hash, or click Hash file and select a file.
2
Pick the algorithm (SHA-1, SHA-256, SHA-384, or SHA-512).
3
Copy the resulting hex digest, or use the compare tool to verify against a published checksum.

Keep going

Generate random IDs

Pick UUIDs when you want randomness rather than a deterministic hash.

Encode hash output as Base64

Convert hex digests to Base64 when an API expects them in that form.

Decode signed JWTs

Inspect token signatures alongside hashing utilities when debugging auth.

Validate signed payloads

Confirm the JSON you're hashing is well-formed before computing a digest.

Common hashing workflows

Verify a release artifact

Hash the downloaded file and compare against the project's published checksum before installing.

Diagnose a webhook signature mismatch

Hash the canonical payload locally to confirm what the upstream signature should be.

Detect duplicate documents

Use the hash of canonical content to identify duplicates without storing the documents themselves.

よくある質問

Web Cryptography APIを使ってSHA-1、SHA-256、SHA-384、SHA-512のダイジェストを計算します。MD5はブラウザのWeb Cryptoで提供されていないため、対応していません。

「Hash file」をクリックしてファイルを選択してください。ダイジェストは生のバイト列から計算されます。テキスト入力欄を編集すると、ファイルではなくテキスト内容のハッシュ計算に戻ります。

Hash AとHash Bに16進文字列を貼り付けます。ツールが空白と大文字/小文字の違いを正規化したうえで一致するかを表示します。公開されているchecksumとダウンロード物の検証に便利です。

いいえ。ファイル内容はFileReaderで読み取り、crypto.subtle.digestでブラウザ内だけで処理します。